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the top of the HQL, so why is there a single map execution time of more than 10 hours, looking at the Kill Map task counter information, such as the following:The single map task reads 10G of data from the HDFs. No, it shouldn't be. The data files that are processed are not fragmented, and a single map task processes a single large file. With this kind of push test, I went to check the hql inside the two table folder below the file, sure enough, the following are all the files in the Lzo format
Tags: centos cephBrief IntroductionThe deployment mode of Ceph mainly includes the following types of nodes:? Ceph OSDs: A Ceph OSD process is mainly used to store data, process data replication, recovery, and fill, adjust the resource combination and provide some monitoring information to Ceph Monitors by checking the heartbeat information of other OSD processes. when the Ceph Storage Cluster needs to prepare two data backups, at least two Ceph OSD p
Objective Keywords: Vitamio, Vplayer, Android player, Android AV, Android open source player This chapter of the Android universal player local playback of the main functions (cache playlist and A-Z quick query function) completed, and play components are not related, but the use of some practical technology, welcome to communicate! Series 1.Android uses Vitamio to build its own universal player (1)--ready 2,Android uses Vitamio to
LUN (Logical Unit number) and find a line similar to the following:#Lun 0 path=/dev/sdb,type=fileio,scsiid=xyz,scsisn=xyz Remove the previous "#" number, "Lun 0 path=/dev/sdb" means block device number 0, mapped disk is/dev/sdb, "Type" value FileIO is the default, can be used for disk, file and LVM, which is set to " FileIO ", which is used primarily for storage sharing on a disk. At this point , the simple iSCSI target configuration is complete and
:/picclife/app/11.2.0/grid/bin$ CRSCTL Check CRSCrs-4638:oracle High Availability Services is onlineCrs-4537:cluster Ready Services are onlineCrs-4529:cluster Synchronization Services is onlineCrs-4533:event Manager is online#查询用户-bash-4.2# ID Oracleuid=501 (Oracle) gid=501 (oinstall) groups=503 (asmadmin), 502 (DBA), 504 (ASMDBA), 505 (Asmoper)-bash-4.2# ID Griduid=502 (GRID) gid=501 (Oinstall) groups=503 (asmadmin), 502 (DBA), 504 (ASMDBA), 505 (Asmoper)Ok!!!!!ORA-15025
development serverSince this project is powered by a restful server, you need to master some Nodejs knowledge. In the project Server.js file, you can see a simple restful server, developed based on the Express.js framework, because you need long-term management of your notes, and the RESTful API allows apps to read, create, edit, and delete notes from the list. The server can also load the file into the browser via HTTP requests, and ionic serve is running your ionic application this way.It is
Build an online storage server on 64-bit centos 6.5Network Disk, also known as cloud storage ". Baidu cloud and Huawei online storage are available in China.Cloud: divided into public and private clouds and hybrid clouds.I am introducing the use of open source software ownCloud to
When MySQL sees the table, it encounters the Select storage Engine: MyISAM and InnoDB. What kind of storage engine is good?1, MyISAM: Table lock, support full-text index, read concurrency performance is good.2, InnoDB: Row lock, support transaction, support foreign key, write concurrency performance is good.In fact, most of the companies now, MySQL's rules are using INNODB as the default
i3-6100B1508G MemoryHDD 2TSSD 120Installing windows2012 R2 DCCreating a storage pool encounters an issue that the system recognizes as unknownFind a solution on Microsoft's website after a searchPS c:\windows\system32> $disks = Get-physicaldisk |? {$_. Canpool-eq $true}PS c:\windows\system32> new-storagepool-storagesubsystemfriendlyname *spaces*-FriendlyName TieredPool- Physicaldisks $disks FriendlyName
Document directory 1. Install the online storage 2. Create SVN reporsitory 3. Use svn-export 4. SVN use-submit 5. Synchronize SVN data 6. Summary 1. Install the online storage Select a well-known network disk storage in China, such as Kingsoft Network Disk and 360 cloud disk. The registered account will provide several GB of space by default, download t
Owncloud Introduction:is a free software developed from the KDE community that provides private WEB services. Current key features include file management (built-in file sharing), music, calendars, contacts, and more, which can be run on PCs and servers.Simply put is a PHP-based self-built network disk. Basically private use this, because until now the development version has not exposed the registration function. I use the php7.1-based lamp environment to b
in the Linux system Build File system, build user, modify user group, reset user passwordExperimental background: User and Space user name: BOSSWLB Group and satellite group: BOSSWLB home directory: /BOSSWLB shell: bash Space: New ( add / enlarge ) 5G unlock password reset abcd12341th: Create a new file s
Distributed storage System is to solve the capacity, performance and other bottlenecks of single-machine storage, as well as the problems of usability and expansibility, and to provide large-capacity, high-performance, highly available and scalable storage services for large-scale
The original Article is wonderful. Address: http://robnapier.net/blog/build-system-1-build-panel-360#more-360 I used xcode 3.2.5 To follow the original article step by step, and the results were slightly different, but it didn't matter. Start of Text Xcode has an advanced build
Fourth, Android build system and custom Android platform system4.1Android compilation systemAndroid's source code is composed of hundreds of thousands of files, these files are interdependent, and some are independent of each other, they are placed in different directories by function or type, for this big project, Android through its own compilation system to co
pressure.To support large capacity, storage nodes (servers) are organized by volume (or grouping). The storage system consists of one or more volumes, the files between the volumes are independent of each other, and the file capacity of all volumes is the file capacity of the entire storage
program to do, very many program apes want to not clear this problem, preferring to devote a lot of energy time to business, but do not know to use tools to improve efficiency . Write a simple tutorial here to show you how to get out of the IDE environment an Android project compiled build, with this basic development what self-motivated build tools are not difficult, a time ago to do a packaged HTML5 appl
The ARM processor adopts the Von noriman structure, that is, the command and data share a 32-bit data bus, and only the loading, saving and switching commands can access the data in the memory. Arm processors Regard memory as a set of linearly increasing bytes starting from 0. For example, the byte 0-3 stores the first stored word, the byte 4-7 stores the word of the second storage, and so on. Address Space: The arm structure uses 232 8-bit address sp
. Registertype - in //Create a AUTOFAC container -var container = Builder. Build (); to //Put the Controller object instance of MVC into AUTOFAC to create +Dependencyresolver.setresolver (NewAutofacdependencyresolver (container)); -} the} *}View Code4, modify the repository assembly and the Services assembly to build the roadbed to the WebUI layer of the bin directory, you can also
Label:Before we proceed with this article, we may need to add some basic knowledge. First of all, our system is based on interface programming, why should we use an excuse to program, in fact, this is the application of an Enterprise Application architecture Pattern Repository (warehousing) A mechanism for encapsulating storage, reading, and finding behavior, which simulates a collection of objects. Support
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